Rhu (/ruː/; Scottish Gaelic: An Rubha [ən ˈrˠu.ə]) is a village and historic parish on the east shore of the Gare Loch in Argyll and Bute, Scotland.

It lies north-west of the town of Helensburgh on the Firth of Clyde, in Argyll & Bute, and historically in the county of Dunbartonshire.

Famously a Theological controversy took place in Rhu known as the "Row Heresy", involving the Church of Scotland minister John McLeod Campbell who began to teach doctrines contrary to the Westminster Confession of Faith and was subsequently thrown out of the ministry in May 1831.

[3] Since December 2015 the Parish Minister is the Reverend David T. Young BA, BD Min (Hons), MTh, RN.

Near the entrance to the Gare Loch there are two sandspits opposite each other, one on either shore of Rhu and Rosneath, forming a narrow constriction about 430 metres (1,410 ft) across.

In the Heart of Midlothian, Sir Walter Scott alludes to the smugglers here, and to this gorge under the name of the Whistlers Glen, so called probably from the fact that those on the outlook gave warning of the approach of a stranger by imitating the whistle of the curlew.

When George IV visited Scotland, he expressed a desire to taste real smuggled whisky; and the Duke of Argyll procured a barrel from a still at the mouth of this glen for his consumption; though the bargain was a difficult one to make, the Duke having to meet the smugglers personally at the end of Row Point.

That summer Matt Dickie joined Rangers, and he made his first team debut on 15 August 1895 in a 5–1 home win over St Mirren.